Tuesday, June 19, 2012

Pre-Columbian Humans Had Little Effect On Amazon Rainforest

June 15, 2012
Source: RedOrbit

Crystal McMichael and other scientists collect soils in the Peruvian Amazon. Credit: Crystal McMichael
Early inhabitants of the Amazon River Basin had little long-term impact on the forests in the area, overturning the notion that the region was a cultural parkland during pre-Columbian times, claims a new study published in the June 15 edition of the journal Science.

The discovery comes after a team of researchers hailing from the Florida Institute of Technology (FIT), the Smithsonian Institution, Wake Forest University and the University of Florida (UF) conducted the first landscape-scale sampling of central and western Amazonia, according to a Thursday FIT press release.

They discovered that the earliest inhabitants spent most of their time near lakes and rivers, and had such little affect on the areas further inland that it seemed as if they could have been tip-toeing from one body of water to another, they added.

“The research team, led by Florida Tech’s Crystal McMichael and Mark Bush, retrieved 247 soil cores from 55 locations throughout the central and western Amazon, sampling sites that were likely disturbed by humans, like river banks and areas known from archeological evidence to have been occupied by people,” the university explained.

“They also collected cores farther away from rivers, where human impacts were unknown and used markers in the cores to track the histories of fire, vegetation and human alterations of the soil. The eastern Amazon has already been studied in detail,” they added. “McMichael, Bush, and their colleagues conclude that people in the central and western Amazon generally lived in small groups, with larger populations on some rivers.”

Their findings are important, as they shed new light on how the Amazonia — one of the world’s most biologically diverse areas — was impacted by humans during its earliest days. That knowledge can help experts learn more about the ecological processes of tropical rainforests, and could aid ongoing conservation efforts, according to FIT.

“Drawing on questionable assumptions, some scholars argue that modern Amazonian biodiversity is more a result of widespread, intensive prehistoric human occupation of the forests than of natural evolutionary and ecological processes,” Dolores R. Piperno, co-author of the study as well as a senior scientist at the Smithsonian Tropical Research Institute, said in a separate statement.

“Climatologists who accept the manufactured landscapes idea may incorporate wholesale prehistoric Amazonian deforestation, widespread fires and carbon emissions into their models of what caused past shifts in atmospheric carbon dioxide and methane levels. But we need much more evidence from Amazonia before anything like that can be assumed,” she added.
Reactions:

5 comments:

Lol said...

we buy junk cars orlando places in East Orlando. The reliable junk car elimination corporations in Florida provide free towing and quick pickup facility of scarp autos. You can make a name on the identified numbers and might simply get linked with the car elimination firms.

Annisa Putri said...

When we make utilization of the healthful influence of the Amazonian plant based super sustenances we pick up a riches that cash can not generally purchase. The abundance of health obat pembesar penis order obat pembesar penis vigrx plus, obat perangsang wanita, obat pembesar payudara, agen obat vmenplus asli, distributor obat vmenplus indonesia, obat pembesar vmenplus asli, agen obat vmenplus jakarta, importir obat vmenplus german, pusat obat vmenplus original, kapsul vimax canada, vimax asli, vimax canada asli, obat pembesar vimax, obat vimax canada, vacum pembesar penis, vacum pembesar alat vital, alat pembesar penis, vacum pembesar payudara, and alat pembesar payudara

Annisa Putri said...

The Camu Berry is one piece of the horde of exceedingly significant supplement rich hotspots for human wellbeing. The human body must have cancer prevention agents, mico supplements, follow minerals in entire sustenance Save Indonesia, also jasa tweet, info cipto junaedy, bekti blog, jasa review, blog cipto junaedy, internet marketing, panduan seo newbie, sensualitas pria wanita, resep masakan, mitra seo info, buku cipto junaedy, cipto junaedy ebook, cipto junaedy seminar, pakar seo murah, bapak cipto junaedy, jasa review murah, and mitra seo blog review structure. Vitamin C is a standout amongst the most crucial cell reinforcements we can devour for our health experience.

hùng đặng said...

Trên thị trường có nhiều loại thực phẩm chức năng: thực phẩm chức năng herbalife có tốt không,Thực phẩm chức năng Herbalife,Thực phẩm chức năng Herbalife tăng cân,Giảm cân bằng thực phẩm chức năng Herbalife,thực phẩm chức năng herbalife giảm cân...nếu bạn không biết nên chọn loại nào tốt cho mình..hãy liên hệ với chúng tôi tại megavita để được tư vấn nhé.
xem thêm:
Thực phẩm chức năng Herbalife.
thuc pham chuc nang herbalife tang can.
thực phẩm chức năng herbalife giảm cân.
thực phẩm chức năng herbalife giảm cân.

Thao Nguyen said...

Bên cạnh việc chuyên cung cấp dịch vụ trọn gói thiết kế và thi công nội thất , OZ luôn đưa ra những sản phẩm thiết kế nhà đẹp, biệt thự đẹp, nhà phố đẹp, căn hộ đẹp, nhà ống đẹp , Bên cạnh đó còn thực hiện ý tưởng của quý khách hàng trong thời gian nhanh nhất với chất lượng nội thất,  nội thất văn phòng,  nội thất nhà phố  tốt nhất thông qua các kiến trúc sư nhiều năm kinh nghiệm tốt nhất thông qua các kiến trúc sư nhiều năm kinh nghiệm, mẫu bếp, tủ bếp cổ điển, tủ bếp hiện đại, suon xao chua ngot, cach lam kim chi, cach nau bo kho, vit om sau, cách làm sữa ngô

Phu tung oto huyndai
ba đờ sốc
Phụ tùng ô tô ford
Phụ tùng ô tô Toyota
Phụ tùng ô tô kia
Phụ tùng ô tô Mitsubishi
Phụ tùng ô tô honda
phụ tùng ô tô
Phụ tùng ô tô mazda
Phụ tùng ô tô Daewoo
Hoàng Gia là thương hiệu wedding planner và tổ chức các sự kiện đặc biệt hàng đầu tại Việt Nam, luôn sáng tạo và đi đầu với những ý tưởng phong san khau vad dịch vụ to chuc dam cuoi cưới độc đáo, ấn tượng cách làm backdrop hoa giấy, nhà bạt không gian  thiệp cưới  Địa điểm tổ chức đám cưới chụp ảnh cưới

cách nấu chè đậu xanh, vịt om sấu , cách làm giá đỗ , cách làm rau câu dừa